This one is a bit more flimsy, as it shakes easily.  The tiered shelves are nice, making it easier for one who's not so agile, or older. Unfortunately, the corner where the 2nd top shelf is attached, broke.  We had to remove it, as the corner is completely damaged & will no longer support it.  Pretty much make for kittens & lighter cats.  Even then, doesn't seem to stable for her.